Sound WavesHard
Question
A tuning fork of frequency 340Hz is vibrate just above the tube of 120 cm height. Water is poured slowly in the tube. What is the minimum height of water necessery for the resonance?
Options
A.45 cm
B.30 cm
C.40 cm
D.25 cm
Solution
We have v = vλ
or λ =
= 1m
First resonating length,.
l1 =
m = 25 cm
second resonating legth,
l2 =
= 75 cm
Third resonating length,
l3 =
= 125 cm
So third resonance is not possible since the length of the tube is 120 cm.
∴ Minimum height of water necessary for resonance = 120 = 75 = 45cm.
or λ =
= 1mFirst resonating length,.
l1 =
m = 25 cmsecond resonating legth,
l2 =
= 75 cmThird resonating length,
l3 =
= 125 cmSo third resonance is not possible since the length of the tube is 120 cm.
∴ Minimum height of water necessary for resonance = 120 = 75 = 45cm.
Create a free account to view solution
View Solution FreeMore Sound Waves Questions
Four open organ pipes of different length and different gases at same temperature as shown in figure. Let fA, fB, fC and...An air column in a pipe, which is closed at one end, will be in resonance with a vibrating tuning fork of frequency 264 ...The tension in a piano wire is 10N. The tension in a piano wire to produce a node of double frequency is:...When two tuning forks (fork 1and fork 2)are sounded simultaneously, 4beats per second are heard. Now some type is attach...A plane transverse wave is propagating in a direction making an angle of 30° with positive x-axis in the x-y plane. Find...